It will most likely use copper QSFP56 cables since these interfaces are either used in inter rack or adjacent rack direct attachments or to the nearest switch.

O.5-1.5/2m copper cables are easily available and cheap and 4-8m (and even longer) is also possible with copper but tends to be more expensive and harder to get by.

Even 800gb is possible with copper cables these days but you’ll end up spending just as much if not more on cabling as the rest of your kit…https://www.fibermall.com/sale-460634-800g-osfp-acc-3m-flt.h...